Use the following information for the next few questions:

Ho: mu1 = mu2

H1: mu1=\=mu2

n1=12 and n2=11

alpha = 0.05

The critical value limits of Welch's 't-test' are (_________) and (upper) based on the textbook recommended simple way of determining the degrees of freedom. Record only the lower limit to three decimal places (example, 0.123).